US6143395A - Computer mouse pad - Google Patents
Computer mouse padDownload PDFInfo
- Publication number
- US6143395A US6143395AUS09/209,050US20905098AUS6143395AUS 6143395 AUS6143395 AUS 6143395AUS 20905098 AUS20905098 AUS 20905098AUS 6143395 AUS6143395 AUS 6143395A
- Authority
- US
- United States
- Prior art keywords
- mouse
- grooves
- ball
- pad
- mouse pad
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/039—Accessories therefor, e.g. mouse pads
- G06F3/0395—Mouse pads
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
- Y10T428/2457—Parallel ribs and/or grooves
Definitions
- This inventionrelates to a computer mouse pad.
- a computer mouseis widely used as a pointing device for a personal computer, for controlling movement of a cursor over the display screen of the computer's monitor.
- the common form of computer mousehas a mouse body for gripping in the user's hand, the mouse body having a bottom wall which slides over a mouse pad.
- the bottom wall of the mouse bodyis formed with an opening which affords access to a cavity containing a mouse ball and a movement encoding mechanism.
- the mouse balltypically has a diameter of about 13/16 inch.
- a retainer plate formed with a circular holeis fitted removably in the opening in the bottom wall of the mouse body.
- the diameter of the circular hole in the retainer plateis somewhat smaller than the diameter of the mouse ball, so the mouse ball is held captive in the cavity in the mouse body but protrudes through the hole in the retainer plate.
- the mouse ballrolls against the movement encoding mechanism, which detects the rolling movement of the mouse ball and generates an electrical pulse signal in response thereto.
- the pulse signalis supplied to the computer's system unit and is used by the system unit to control movement of the cursor over the computer's monitor screen.
- the computers that are used in schoolsare frequently equipped with mouses. If foreign matter, such as a dust particle, is present on the mouse pad, it might adhere to the mouse ball when the mouse moves over the particle. In this event, the particle might be carried by the mouse ball into the cavity of the mouse body and be transferred to the movement encoding mechanism. There is then a possibility that operation of the movement encoding mechanism will be impaired. This may lead to erratic movement of the cursor. Although efforts are made to keep school computer labs clean, the computer mouse is frequently in need of cleaning to remove dirt from the ball and from the movement encoding mechanism.
- a typical mouse padis made of a resilient material, such as rubber.
- the upper surface of the mouse pad, on which the mouse slides,is smooth except for a layer of fabric which is glued to the upper surface of the mouse pad in order to provide frictional engagement with the mouse ball.
- a mouse padhaving a lower surface for resting on a support structure and an upper surface for supporting a mouse, the upper surface of the mouse pad being formed with grooves of width substantially smaller than the diameter of the mouse ball, whereby particles that fall in the grooves do not adhere to the mouse ball when the mouse is moved over the mouse pad.
- FIG. 1is a top plan view of a first mouse pad in accordance with the present invention.
- FIG. 2is a sectional view taken on the line II--II in FIG. 1.
- the mouse pad shown in FIG. 1is designed for use with a mouse having a ball about 13/16 inch in diameter.
- the mouse padis made of a semisoft rubber material.
- the rubber materialhas a durometer which is typically in the range 30-40 and is preferably about 35. This is comparable to the durometer of the rubber used in manufacture of conventional mouse pads.
- the padis molded to provide a pattern of narrow grooves, each typically about 1/32 inch wide and at a spacing of about 3/16 inch, in its upper surface.
- the groovesare about 1/16 inch deep. The upper corners of the grooves, where the grooves meet the upper surface of the pad, are sharp.
- the effective surface area of the mouse padis reduced by about one-seventh. Approximately one-seventh of the dust particles that are precipitated on the mouse pad will fall in one of the grooves. Once a dust particle has fallen into a groove, it will remain in the groove until it is removed, e.g. by shaking the mouse pad or by vacuuming, and will not be picked up by the mouse ball and contaminate the movement encoding mechanism. Further, since the effective surface area of the mouse pad is reduced, the area of the mouse pad from which a particle can be picked up by the mouse ball during movement of the mouse is reduced. Moreover, if a particle of dust is picked up by the mouse ball and carried by the mouse ball while the ball rotates, there is a possibility that the particle will fall from the mouse ball into a groove.
- the bottom wall of the conventional mouse bodyis formed with gliders which rest on the upper surface of the mouse pad. These gliders serve to sweep a foreign particle that settles on the land between two grooves toward the next groove along the path of movement of the mouse, as shown in FIG. 2.
- the particlemay either fall into the groove as the glider advances across the groove or be wiped from the glider by the sharp edge at the far side of the groove so that the particle then falls into the groove.
- the width of the groovesis substantially less than the diameter of the mouse ball (only about one-twenty fifth of the diameter of the mouse ball in the case of the example), the grooves do not adversely affect the smoothness with which the ball rolls over the mouse pad and hence the smoothness with which the mouse slides over the mouse pad.
- the rubber that is used in manufacture of conventional mouse padsis somewhat sticky or gummy. This does not affect the performance of the mouse because the conventional pad has a covering of fabric, as mentioned above. However, when there is no covering, the gliders on the bottom of the mouse do not slide smoothly over the mouse pad, and foreign particles on the mouse pad tend to stay in place and are not readily swept over the mouse pad by the gliders of the mouse. It is therefore preferred that the mouse pad in accordance with the invention not be made of the same type of rubber material as is used in manufacture of conventional mouse pads but that the composition of the rubber material be formulated so that it is not gummy or sticky. It has been found that a suitable material is thermal plastic rubber. In particular, the material sold under the designation SANTOPRENE, grade 103-40 is currently preferred.
- the pattern of groovesis made up of narrower concentric arcuate grooves and a slightly wider peripheral groove along the four edges of the mouse pad, surrounded by a margin strip. Some of the arcuate grooves intersect the peripheral groove.
- the width of the peripheral grooveis greater than the possible error in position of an end of one of the arcuate grooves that intersect the peripheral groove, so that when the die for molding the pad is made, one can be assured that each arcuate groove that intersects the peripheral groove will open into the peripheral groove and will not encroach on the margin strip of the pad.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Position Input By Displaying (AREA)
Abstract
Description
This invention relates to a computer mouse pad.
A computer mouse is widely used as a pointing device for a personal computer, for controlling movement of a cursor over the display screen of the computer's monitor. The common form of computer mouse has a mouse body for gripping in the user's hand, the mouse body having a bottom wall which slides over a mouse pad. The bottom wall of the mouse body is formed with an opening which affords access to a cavity containing a mouse ball and a movement encoding mechanism. The mouse ball typically has a diameter of about 13/16 inch. A retainer plate formed with a circular hole is fitted removably in the opening in the bottom wall of the mouse body. The diameter of the circular hole in the retainer plate is somewhat smaller than the diameter of the mouse ball, so the mouse ball is held captive in the cavity in the mouse body but protrudes through the hole in the retainer plate. As the user slides the mouse over the mouse pad, the mouse ball rolls against the movement encoding mechanism, which detects the rolling movement of the mouse ball and generates an electrical pulse signal in response thereto. The pulse signal is supplied to the computer's system unit and is used by the system unit to control movement of the cursor over the computer's monitor screen.
The computers that are used in schools are frequently equipped with mouses. If foreign matter, such as a dust particle, is present on the mouse pad, it might adhere to the mouse ball when the mouse moves over the particle. In this event, the particle might be carried by the mouse ball into the cavity of the mouse body and be transferred to the movement encoding mechanism. There is then a possibility that operation of the movement encoding mechanism will be impaired. This may lead to erratic movement of the cursor. Although efforts are made to keep school computer labs clean, the computer mouse is frequently in need of cleaning to remove dirt from the ball and from the movement encoding mechanism.
A typical mouse pad is made of a resilient material, such as rubber. The upper surface of the mouse pad, on which the mouse slides, is smooth except for a layer of fabric which is glued to the upper surface of the mouse pad in order to provide frictional engagement with the mouse ball.
In accordance with the invention there is provided a mouse pad having a lower surface for resting on a support structure and an upper surface for supporting a mouse, the upper surface of the mouse pad being formed with grooves of width substantially smaller than the diameter of the mouse ball, whereby particles that fall in the grooves do not adhere to the mouse ball when the mouse is moved over the mouse pad.
For a better understanding of the invention, and to show how the same may be carried into effect, reference will now be made, by way of example, to the accompanying drawings, in which
FIG. 1 is a top plan view of a first mouse pad in accordance with the present invention, and
FIG. 2 is a sectional view taken on the line II--II in FIG. 1.
The mouse pad shown in FIG. 1 is designed for use with a mouse having a ball about 13/16 inch in diameter. The mouse pad is made of a semisoft rubber material. The rubber material has a durometer which is typically in the range 30-40 and is preferably about 35. This is comparable to the durometer of the rubber used in manufacture of conventional mouse pads. There is no layer of fabric attached to the upper surface of the pad. On the contrary, the pad is molded to provide a pattern of narrow grooves, each typically about 1/32 inch wide and at a spacing of about 3/16 inch, in its upper surface. The grooves are about 1/16 inch deep. The upper corners of the grooves, where the grooves meet the upper surface of the pad, are sharp.
By forming the grooves in the upper surface of the pad, the effective surface area of the mouse pad is reduced by about one-seventh. Approximately one-seventh of the dust particles that are precipitated on the mouse pad will fall in one of the grooves. Once a dust particle has fallen into a groove, it will remain in the groove until it is removed, e.g. by shaking the mouse pad or by vacuuming, and will not be picked up by the mouse ball and contaminate the movement encoding mechanism. Further, since the effective surface area of the mouse pad is reduced, the area of the mouse pad from which a particle can be picked up by the mouse ball during movement of the mouse is reduced. Moreover, if a particle of dust is picked up by the mouse ball and carried by the mouse ball while the ball rotates, there is a possibility that the particle will fall from the mouse ball into a groove.
The bottom wall of the conventional mouse body is formed with gliders which rest on the upper surface of the mouse pad. These gliders serve to sweep a foreign particle that settles on the land between two grooves toward the next groove along the path of movement of the mouse, as shown in FIG. 2. The particle may either fall into the groove as the glider advances across the groove or be wiped from the glider by the sharp edge at the far side of the groove so that the particle then falls into the groove.
Since the width of the grooves is substantially less than the diameter of the mouse ball (only about one-twenty fifth of the diameter of the mouse ball in the case of the example), the grooves do not adversely affect the smoothness with which the ball rolls over the mouse pad and hence the smoothness with which the mouse slides over the mouse pad.
The rubber that is used in manufacture of conventional mouse pads is somewhat sticky or gummy. This does not affect the performance of the mouse because the conventional pad has a covering of fabric, as mentioned above. However, when there is no covering, the gliders on the bottom of the mouse do not slide smoothly over the mouse pad, and foreign particles on the mouse pad tend to stay in place and are not readily swept over the mouse pad by the gliders of the mouse. It is therefore preferred that the mouse pad in accordance with the invention not be made of the same type of rubber material as is used in manufacture of conventional mouse pads but that the composition of the rubber material be formulated so that it is not gummy or sticky. It has been found that a suitable material is thermal plastic rubber. In particular, the material sold under the designation SANTOPRENE, grade 103-40 is currently preferred.
As shown in FIG. 1, the pattern of grooves is made up of narrower concentric arcuate grooves and a slightly wider peripheral groove along the four edges of the mouse pad, surrounded by a margin strip. Some of the arcuate grooves intersect the peripheral groove. The width of the peripheral groove is greater than the possible error in position of an end of one of the arcuate grooves that intersect the peripheral groove, so that when the die for molding the pad is made, one can be assured that each arcuate groove that intersects the peripheral groove will open into the peripheral groove and will not encroach on the margin strip of the pad.
It will be appreciated that the invention is not restricted to the particular embodiment that has been described, and that variations may be made therein without departing from the scope of the invention as defined in the appended claims and equivalents thereof.
Claims (7)
1. A mouse pad having a lower surface for resting on a support structure and an upper surface for supporting a mouse having a mouse ball, the upper surface of the mouse pad being formed with grooves that are large enough that dust particles will fall into the grooves and will not adhere to the mouse ball when the mouse is moved over the mouse pad, the grooves being of width substantially smaller than the diameter of the mouse ball and being spaced at a distance substantially greater than the width of the grooves so that the mouse ball rolls smoothly over the mouse pad, and wherein the grooves are in a pattern of concentric arcs.
2. A mouse pad having a lower surface for resting on a support structure and an upper surface for supporting a mouse having a mouse ball, the upper surface of the mouse pad being formed with grooves that are large enough that dust particles will fall into the grooves and will not adhere to the mouse ball when the mouse is moved over the mouse pad, the grooves being of width substantially smaller than the diameter of the mouse ball and being spaced at a distance substantially greater than the width of the grooves so that the mouse ball rolls smoothly over the mouse pad, and wherein the grooves are at a spacing of about six times their width.
3. A mouse pad according to claim 1, wherein the grooves are about 1/32 inch in width and are at a spacing of about 3/16 inch.
4. A mouse pad according to claim 3, wherein the grooves are about 1/16 inch deep.
5. A mouse pad having a lower surface for resting on a support structure and an upper surface for supporting a mouse having a mouse ball, the upper surface of the mouse pad being formed with grooves that are large enough that dust particles will fall into the grooves and will not adhere to the mouse ball when the mouse is moved over the mouse pad, the grooves being of width substantially smaller than the diameter of the mouse ball and being spaced at a distance substantially greater than the width of the grooves so that the mouse ball rolls smoothly over the mouse pad, and wherein the grooves are about 1/16 inch deep.
6. A mouse pad having a lower surface for resting on a support structure and an upper surface for supporting a mouse having a mouse ball, the upper surface of the mouse Pad being formed with grooves that are large enough that dust particles will fall into the grooves and will not adhere to the mouse ball when the mouse is moved over the mouse pad, the grooves being of width substantially smaller than the diameter of the mouse ball and being spaced at a distance substantially greater than the width of the grooves so that the mouse ball rolls smoothly over the mouse pad, and wherein the grooves have elongate ridges therebetween.
7. A mouse pad according to claim 6, wherein the grooves are steep-sided and the sides of a groove meet the ridges at each side of the groove at a sharp edge, whereby a particle adhering to the underside of the mouse may be wiped from the mouse as the mouse traverses the groove.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US09/209,050US6143395A (en) | 1998-12-09 | 1998-12-09 | Computer mouse pad |
| CA002266270ACA2266270A1 (en) | 1998-12-09 | 1999-03-22 | Computer mouse pad |
| PCT/US1999/026216WO2000034941A1 (en) | 1998-12-09 | 1999-11-05 | Computer mouse pad |
| AU19096/00AAU1909600A (en) | 1998-12-09 | 1999-11-05 | Computer mouse pad |
| US09/655,988US6500522B1 (en) | 1998-12-09 | 2000-09-06 | Pointing device including a computer mouse pad |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US09/209,050US6143395A (en) | 1998-12-09 | 1998-12-09 | Computer mouse pad |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US1999/026216Continuation-In-PartWO2000034941A1 (en) | 1998-12-09 | 1999-11-05 | Computer mouse pad |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US09/655,988Continuation-In-PartUS6500522B1 (en) | 1998-12-09 | 2000-09-06 | Pointing device including a computer mouse pad |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US6143395Atrue US6143395A (en) | 2000-11-07 |
Family
ID=22777114
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US09/209,050Expired - Fee RelatedUS6143395A (en) | 1998-12-09 | 1998-12-09 | Computer mouse pad |
| US09/655,988Expired - Fee RelatedUS6500522B1 (en) | 1998-12-09 | 2000-09-06 | Pointing device including a computer mouse pad |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US09/655,988Expired - Fee RelatedUS6500522B1 (en) | 1998-12-09 | 2000-09-06 | Pointing device including a computer mouse pad |
Country Status (2)
| Country | Link |
|---|---|
| US (2) | US6143395A (en) |
| CA (1) | CA2266270A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6500522B1 (en)* | 1998-12-09 | 2002-12-31 | Robert C. Perry | Pointing device including a computer mouse pad |
| US20030151666A1 (en)* | 2002-02-13 | 2003-08-14 | Modest Khovaylo | Imaging apparatus with mouse pad |
| USD1010732S1 (en)* | 2020-11-12 | 2024-01-09 | Ditec Solutions Llc | Pad for 3D printer pen |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20319166U1 (en)* | 2003-11-25 | 2004-03-11 | Sohn, Ingmar | Mousepad |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4485919A (en)* | 1982-08-12 | 1984-12-04 | Dan Sandel | Sterilizable foam support tray for medical instruments |
| US4799054A (en)* | 1987-02-18 | 1989-01-17 | Data Pad Corp. | Mouse operating pad |
| US4868940A (en)* | 1988-12-27 | 1989-09-26 | The United States Of America As Represented By The Secretary Of The Army | Cushioning mat for use as portable bedding |
| US5360653A (en)* | 1992-12-21 | 1994-11-01 | Ackley Robert E | Encapsulated foam pad |
| US5508084A (en)* | 1991-08-28 | 1996-04-16 | Minnesota Mining And Manufacturing Company | Repositionable articles having a microstructured surface, kits for producing same, and methods of use |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6143395A (en)* | 1998-12-09 | 2000-11-07 | Perry; Robert C. | Computer mouse pad |
- 1998
- 1998-12-09USUS09/209,050patent/US6143395A/ennot_activeExpired - Fee Related
- 1999
- 1999-03-22CACA002266270Apatent/CA2266270A1/ennot_activeAbandoned
- 2000
- 2000-09-06USUS09/655,988patent/US6500522B1/ennot_activeExpired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4485919A (en)* | 1982-08-12 | 1984-12-04 | Dan Sandel | Sterilizable foam support tray for medical instruments |
| US4799054A (en)* | 1987-02-18 | 1989-01-17 | Data Pad Corp. | Mouse operating pad |
| US4868940A (en)* | 1988-12-27 | 1989-09-26 | The United States Of America As Represented By The Secretary Of The Army | Cushioning mat for use as portable bedding |
| US5508084A (en)* | 1991-08-28 | 1996-04-16 | Minnesota Mining And Manufacturing Company | Repositionable articles having a microstructured surface, kits for producing same, and methods of use |
| US5360653A (en)* | 1992-12-21 | 1994-11-01 | Ackley Robert E | Encapsulated foam pad |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6500522B1 (en)* | 1998-12-09 | 2002-12-31 | Robert C. Perry | Pointing device including a computer mouse pad |
| US20030151666A1 (en)* | 2002-02-13 | 2003-08-14 | Modest Khovaylo | Imaging apparatus with mouse pad |
| USD1010732S1 (en)* | 2020-11-12 | 2024-01-09 | Ditec Solutions Llc | Pad for 3D printer pen |
| USD1067317S1 (en) | 2020-11-12 | 2025-03-18 | Ditec Solutions | Pad for 3D printer pen |
Also Published As
| Publication number | Publication date |
|---|---|
| US6500522B1 (en) | 2002-12-31 |
| CA2266270A1 (en) | 2000-06-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4799054A (en) | Mouse operating pad | |
| US5340075A (en) | Ergonomic mouse pad | |
| US6844872B1 (en) | Computer mouse having side areas to maintain a depressed button position | |
| US6143395A (en) | Computer mouse pad | |
| US20080246730A1 (en) | Computer Input Device with Improved Control Performance | |
| KR200168773Y1 (en) | Mouse | |
| US7400317B2 (en) | Finger navigation system using captive surface | |
| WO2000034941A1 (en) | Computer mouse pad | |
| US5400054A (en) | Manually operable device for indicating position on a display screen | |
| US7948473B2 (en) | Mouse device | |
| US4881065A (en) | X-Y position input apparatus including preventing dust interference | |
| US5990871A (en) | Ergonomic pointing device | |
| US6043808A (en) | Computer mouse assembly including a protective cover | |
| JP2007505414A (en) | A device that allows the use of computer pointing devices within the keyboard footprint | |
| US20020104948A1 (en) | Computer keyboard/mouse support apparatus | |
| US20020113776A1 (en) | Trackball mouse | |
| US7538758B2 (en) | Absolute coordinate, single user-interface element pointing device | |
| US5379054A (en) | Pointing device | |
| WO2001055828A2 (en) | Mouse | |
| JPH06348407A (en) | Movement surface for computer mouse | |
| KR200226511Y1 (en) | Mousepad | |
| JPH0194421A (en) | pointing device | |
| KR19990001786U (en) | Ballmouth Cleaning Device | |
| KR19990019180U (en) | Mouse plate for personal computer | |
| JP2992281B1 (en) | Mouse pad |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| CC | Certificate of correction | ||
| REMI | Maintenance fee reminder mailed | ||
| LAPS | Lapse for failure to pay maintenance fees | ||
| STCH | Information on status: patent discontinuation | Free format text:PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 | |
| FP | Lapsed due to failure to pay maintenance fee | Effective date:20041107 |